Fix various bugs in the event system

Squash many bugs in the event notification system and simplify the
code.

utils/dedup.py

@@ -1,11 +1,13 @@
 from datetime import datetime
 from csiphash import siphash24
+from copy import deepcopy
 from json import dumps
 import main
 from utils.logging.debug import debug
 
-def dedup(numName, c):
-    # deduplication
+def dedup(numName, b):
+    c = deepcopy(b)
+    del c["time"]
     c["approxtime"] = str(datetime.utcnow().timestamp())[:main.config["Tweaks"]["DedupPrecision"]]
     castHash = siphash24(main.hashKey, dumps(c, sort_keys=True).encode("utf-8"))
     del c["approxtime"]